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'jun Style' Copy Intake Plenum For Rb25

jonnob55

By jonnob55,
in Engines & Forced Induction

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Ryno Experienced

Ryno

Posted
Posted

Finally fitted the plenum to my car. It went on the same time as a Hybrid intercooler kit, and GFB plub back BOV.

It was a bit of a drama to fit, but I think it was well worth it in the end.

Here's a couple of pics:

post-3204-1193459712_thumb.jpg

post-3204-1193459760_thumb.jpg

Ryno Experienced

Ryno

Posted
Posted

It definitely doesn't feel any laggier than before. The large throttle body does make it feel more responsive, as it now takes less throttle position to have the same effect as the stock one.

Hopefully I'll have it on the dyno (to get re-tuned) sometime this week, so I'll let you know what numbers it puts down.

Ryno Experienced

Ryno

Posted
Posted
Interesting throttle body, where did you pick that up from?

I purchased it as a package (along with the plenum) on ebay. I had my choice of 80mm, 90mm or 100mm!!! I decided to go for the 80mm option, as the others seemed like overkill for the power output I'm after.

The car seems to be idling and starting better than it did with the standard throttle body. So I have no complaints.

I've had a read through the 'how to' guide for the Greddy copy plenum, and it seems like the issues I had to overcome on fitting this plenum, are very similar to what he had to go through when fitting the Greddy one.

I highly recommend this plenum and throttle body as an alternative to Greddy's plenum (or copy).

Ryno Experienced

Ryno

Posted
Posted
Did you have to muck about to fit the tps or did it bolt up? I've seen the TB's on ebay and often wondered if it would work

Very interested to see a before and after dyno.

Yeah we did have to modify the TPS, as the one I was sent suits other Nissan models (like pulsar) but not mine. I emailed the guy about it, and he said it was his mistake for not asking what engine model I have - so he's sending out the correct one.

Will post up the dyno results later this week (if I can get in to see the tuner).

Ryno Experienced

Ryno

Posted
Posted

Unfortunately I wasn't able to get in to see the tuner this week, and I'm going away for work this weekend, so I won't be able to get it re-tuned for a while.

What I can say though, is that I have gained some low end torque (which was completely unexpected)... My GT-RS now builds positive boost at just below 2000 rpm (in the taller gears) - about 500 rpm earlier than with the standard plenum. Even without the re-tune, this plenum is an awesome improvement.

Ryno

  • 1 month later...
  • 5 months later...
BoostdR Mentor

BoostdR

Posted
Posted (edited)

I know of a certain 2JZ with a KU engineering Plenum and TB making 430rwkw, And a GTR that went 2seconds faster a lap (Mallala) after installing one. I am also looking at using one for my RB31DETT.

FYI

RB20, RB25 use the std runners

RB26 have KU Engineering cast runners to replace the throotle bodies

Edited by BoostdR
  • 3 months later...
  • 2 weeks later...
Ryno Experienced

Ryno

Posted
Posted

Sorry for the lack of updates, I've been unable to get on here for the last 6 months or so...

When the car was dyno tuned, it made 240 rwkw at 17psi - Which should equate to about 260rwkw on Unique Autosports dyno. As with my previous dyno tune when I went from my tuners dyno to the Dyno day at Unique it made about 10% more power.

It is a dream to drive, even on low boost (12psi) the car is a missile. I would recommend this upgrade to anyone.

  • 5 months later...
murrayis Mentor

murrayis

Posted
Posted

If you use msn his email address is: [email protected] and his name is Jack, I bought my rb20 intake firstcly with him he also supplied me with a rb26 fuel rail and custom adapters to suite the rb20 mounts.

Nice guy pleasure to deal with :D

  • 4 months later...
anthonymcgrath Collaborator

anthonymcgrath

Posted
Posted

hey guys sorry for bringing up an old thread but I've done some searching on here and I didn't want to pester everyone by kicking up another new thread.

I asked about a greddy style plenum on here not too long back - I got a reply from a company called performance-wise. I've dealt with this chap a few years ago and bought a PowerFC for my first 33gtst at a great price.

anyhow I got a pm for a greddy style plenum from this chap - I tried putting up the pic but it wont let me strangely so here's a link...

http://www.skylinesaustralia.com/forums/ms...25det-intake-ma

$460 shipped from uk - seems like a great price but my question is would it cause any issues? I've heard all kinds of thoughts on proper Greddy/Trust ones vs copies. I have to say I doubt theres any blinking difference, but seeing as you guys have tinkered with these cars over there far more than us backyard enthusiasts have here.

I'd appreciate your thoughts on this - I cant afford a true Trust/Greddy one (are they the same company?) so a copy would have to do but would I be looking at any tinkering/butchering to get it to fit?

thanks!

anthony

uk

  • 8 months later...
eXquiSit Mentor

eXquiSit

Posted
Posted

so its been a couple of years now and i am curious to see how many people run these plenums now

it seems they are also catering for neo engines which is good as genuine and fake greddys do not alot neo owners to use all the standard idle control etc

any updates would be awesome!

TJ_R33 Community Regular

TJ_R33

Posted
Posted

I running one now, and a guy around the corner from me was running one on his 25/30 and the guys at EFI in QLD were suprised at how much torque it was making. He selling it and a throttle body too suit in the for sale thread is anyone wants one.

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